Experiments on the attenuation of third sound in saturated superfluid helium films | Zendy

Kenneth L. Telschow | Zendy; Robert K. Galkiewicz | Zendy; R. B. Hallock | Zendy

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Experiments on the attenuation of third sound in saturated superfluid helium films

Author(s) -

Kenneth L. Telschow,

Robert K. Galkiewicz,

R. B. Hallock

Publication year - 1976

Publication title -

physical review. b, solid state

Language(s) - English

Resource type - Journals

ISSN - 0556-2805

DOI - 10.1103/physrevb.14.4883

Subject(s) - attenuation , superfluidity , superfluid helium 4 , sound (geography) , condensed matter physics , acoustic attenuation , materials science , helium , helium 4 , second sound , isotopes of helium , physics , atomic physics , optics , acoustics

Upper limits of the attenuation of third sound in saturated superfluid /sup 4/He films have been measured in three separate experiments. Observations at frequencies from 0.1 to 200 Hz indicate that the attenuation in these thick films is substantially lower than would be inferred from the only previous experiment done on saturated films. The third-sound velocity is observed to have the temperature dependence predicted by Bergman. (AIP)

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